The spelling "leading a use" can be explained using the International Phonetic Alphabet (IPA). "Leading" is pronounced /ˈliːdɪŋ/, with the "ea" representing the long "ee" sound. "A" is pronounced /ə/, with the schwa sound in the middle. "Use" is pronounced /juːs/, with the "u" representing the "oo" sound, and a final "s" sound. Overall, the word is spelled as it is pronounced, with each letter representing a corresponding sound.